12509731733 has 4 divisors (see below), whose sum is σ = 12522536940. Its totient is φ = 12496926528.

The previous prime is 12509731693. The next prime is 12509731747. The reversal of 12509731733 is 33713790521.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 33713790521 = 887 ⋅38008783.

It can be written as a sum of positive squares in 2 ways, for example, as 11156006884 + 1353724849 = 105622^2 + 36793^2 .

It is a cyclic number.

It is not a de Polignac number, because 12509731733 - 2²⁴ = 12492954517 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12509731753) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6401138 + ... + 6403091.

It is an arithmetic number, because the mean of its divisors is an integer number (3130634235).

Almost surely, 2^12509731733 is an apocalyptic number.

It is an amenable number.

12509731733 is a deficient number, since it is larger than the sum of its proper divisors (12805207).

12509731733 is an equidigital number, since it uses as much as digits as its factorization.

12509731733 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12805206.

The product of its (nonzero) digits is 119070, while the sum is 41.

The spelling of 12509731733 in words is "twelve billion, five hundred nine million, seven hundred thirty-one thousand, seven hundred thirty-three".